SIGABRT Crash when attaching a document to a PDFView - swift

Question

I'm very new to Swift - having some trouble doing the simple task of displaying a document in a PDFView. I am not using Storyboards or IBOutlets etc. Any idea why the below is crashing?
I have tried referencing an external link, but it gives me the same error. The PDF exists in the bundle directory.
import UIKit
import PDFKit
class ViewController: UIViewController {
private var pdfView = PDFView()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let myNewView = PDFView(frame: CGRect(x: 10, y: 100, width: 500, height: 500))
// Add border to UIView
myNewView.layer.borderWidth=2
// Change UIView Border Color to Red
myNewView.layer.borderColor = UIColor.red.cgColor
guard let path = Bundle.main.path(forResource: "CV", ofType: "pdf") else { return }
let url = URL(fileURLWithPath: path)
let document = PDFDocument(url: url)
myNewView.document = document
// Add UIView as a Subview
self.view.addSubview(myNewView)
}
}
Build succeeds. But I get the below.
2019-06-13 17:49:35.702174+0100 Appp[81235:19343962] * Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan nan]'
* First throw call stack:
(
0 CoreFoundation 0x00000001083446fb exceptionPreprocess + 331
1 libobjc.A.dylib 0x0000000106250ac5 objc_exception_throw + 48
2 CoreFoundation 0x0000000108344555 +[NSException raise:format:] + 197
3 QuartzCore 0x000000010b4072ae _ZN2CA5Layer12set_positionERKNS_4Vec2IdEEb + 140
4 QuartzCore 0x000000010b3f668b -[CALayer setPosition:] + 57
5 QuartzCore 0x000000010b3f6de3 -[CALayer setFrame:] + 560
6 PDFKit 0x0000000107135097 -[PDFPageLayerTile initWithFrame:forPageLayer:withRenderingTransform:tileContentsScale:generationID:] + 168
7 PDFKit 0x000000010713a805 -[PDFPageLayer _updateTiles] + 3439
8 PDFKit 0x0000000107135d8e -[PDFPageLayer setNeedsTilesUpdate] + 87
9 PDFKit 0x000000010714a97d -[PDFPageView setNeedsTilesUpdate] + 48
10 PDFKit 0x000000010714c816 -[PDFPageView setFrame:] + 334
11 PDFKit 0x000000010714311c -[PDFDocumentView createPageViewForPageAtIndex:] + 764
12 PDFKit 0x0000000107144326 -[PDFDocumentView updateVisibility] + 1726
13 PDFKit 0x00000001071b376f -[PDFView resizeDisplayView:] + 517
14 PDFKit 0x00000001071accdf -[PDFView layoutDocumentView] + 464
15 PDFKit 0x00000001071a836a -[PDFView setDocument:waitDuration:] + 1246
16 Appp 0x000000010596c4d1 $s7Appp14ViewControllerC11viewDidLoadyyF + 1441
17 Appp 0x000000010596c7b4 $s7Appp14ViewControllerC11viewDidLoadyyFTo + 36
18 UIKitCore 0x000000010d0ec43b -[UIViewController loadViewIfRequired] + 1183
19 UIKitCore 0x000000010d0ec868 -[UIViewController view] + 27
20 UIKitCore 0x000000010d724c33 -[UIWindow addRootViewControllerViewIfPossible] + 122
21 UIKitCore 0x000000010d725327 -[UIWindow _setHidden:forced:] + 289
22 UIKitCore 0x000000010d737f86 -[UIWindow makeKeyAndVisible] + 42
23 UIKitCore 0x000000010d6e7f1c -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4555
24 UIKitCore 0x000000010d6ed0c6 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1617
25 UIKitCore 0x000000010cf326d6 __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 904
26 UIKitCore 0x000000010cf3afce +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
27 UIKitCore 0x000000010cf322ec -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 236
28 UIKitCore 0x000000010cf32c48 -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 1091
29 UIKitCore 0x000000010cf30fba __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 782
30 UIKitCore 0x000000010cf30c71 -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 433
31 UIKitCore 0x000000010cf359b6 __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 576
32 UIKitCore 0x000000010cf36610 _performActionsWithDelayForTransitionContext + 100
33 UIKitCore 0x000000010cf3571d -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 223
34 UIKitCore 0x000000010cf3a6d0 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
35 UIKitCore 0x000000010d6eb9a8 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 514
36 UIKitCore 0x000000010d2a2dfa -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
37 FrontBoardServices 0x00000001135df125 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 448
38 FrontBoardServices 0x00000001135e8ed6 __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 283
39 FrontBoardServices 0x00000001135e8700 __40-[FBSWorkspace _performDelegateCallOut:]_block_invoke + 53
40 libdispatch.dylib 0x00000001096d7db5 _dispatch_client_callout + 8
41 libdispatch.dylib 0x00000001096db2ba _dispatch_block_invoke_direct + 300
42 FrontBoardServices 0x000000011361a146 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK + 30
43 FrontBoardServices 0x0000000113619dfe -[FBSSerialQueue _performNext] + 451
44 FrontBoardServices 0x000000011361a393 -[FBSSerialQueue _performNextFromRunLoopSource] + 42
45 CoreFoundation 0x00000001082abbe1 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
46 CoreFoundation 0x00000001082ab463 __CFRunLoopDoSources0 + 243
47 CoreFoundation 0x00000001082a5b1f __CFRunLoopRun + 1231
48 CoreFoundation 0x00000001082a5302 CFRunLoopRunSpecific + 626
49 GraphicsServices 0x00000001107c62fe GSEventRunModal + 65
50 UIKitCore 0x000000010d6eeba2 UIApplicationMain + 140
51 Appp 0x000000010596f68b main + 75
52 libdyld.dylib 0x000000010974c541 start + 1
53 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

Answer 1

If you move myNewView.document = document to viewDidAppear: instead of viewDidLoad, the document will load without issue.
Unfortunately, there were changes to iOS between 12.1 and 12.2 that make this necessary.